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VideoFrameBuffer Class Reference

This class serves as a frame buffer and event handler of a graphical widget/label for displaying video frames.

It manages an pixmap/image object as a frame buffer whose pixels may be set using the setPixel() method. For painting the frame buffer's contents into the label/widget's pixmap, a customEvent() handler is implemented. . More...

#include <VideoFrameBuffer.hpp>

Inheritance diagram for VideoFrameBuffer:

QFrameBuffer SDLFrameBuffer X11FrameBuffer List of all members.

Public Member Functions

 VideoFrameBuffer (bool gray)
 Constructor.
virtual ~VideoFrameBuffer ()
 Destructor.
virtual void setPixel (int x, int y, uint index_or_rgb)
 Set a pixel in the frame buffer.
virtual void bitBlt (AU *au)
 does the fast bitblitting of the full (and unscaled) Frame
void lock ()
 Lock the mutex protecting the frame buffer.
void unlock ()
 Unlock the mutex locked by lock().
virtual void postPaintEvent ()=0
 Post a custom event for this object to display the frame buffer on the label/widget.

Protected Attributes

bool gray

Detailed Description

This class serves as a frame buffer and event handler of a graphical widget/label for displaying video frames.

It manages an pixmap/image object as a frame buffer whose pixels may be set using the setPixel() method. For painting the frame buffer's contents into the label/widget's pixmap, a customEvent() handler is implemented. .

Author:
Mario Taschwer and Michael Kropfberger
Version:
Id
VideoFrameBuffer.hpp,v 1.5 2005/04/27 10:21:51 klschoef Exp

Definition at line 65 of file VideoFrameBuffer.hpp.

Member Function Documentation

void VideoFrameBuffer::lock (   )  [inline]
 

Lock the mutex protecting the frame buffer.

This function will block the calling thread until the mutex can be obtained.

See also:
unlock()

Reimplemented in SDLFrameBuffer.

Definition at line 91 of file VideoFrameBuffer.hpp.

References VMutex::lock().

Referenced by QFrameBuffer::customEvent(), and VideoRenderer::writeFrame().

00091                      {
00092     mutex.lock(); 
00093   }

virtual void VideoFrameBuffer::setPixel (  int  x,
int  y,
uint  index_or_rgb
)  [inline, virtual]
 

Set a pixel in the frame buffer.

If this method is called from a thread other than the Qt GUI thread, the frame buffer should be locked before by calling the lock() method.

Reimplemented in QFrameBuffer, SDLFrameBuffer, and X11FrameBuffer.

Definition at line 81 of file VideoFrameBuffer.hpp.

00081 {};

The documentation for this class was generated from the following files: